Physics
A filament bulb 500 W, 100 V is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W . The value of R is :-
22
Aug
A filament bulb 500 W, 100 V is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W . The value of R is :- 100 V is to be used in a 230 V main supply. When a [...]
Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be
22
Aug
Six similar bulbs are connected as shown in the figure with a DC source of emf E and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section A and one from section B are glowing, will be are connected [...]
The charge flowing through a resistance R varies with time t as Q=at−bt2. The total heat produced in R is
22
Aug
The charge flowing through a resistance R varies with time t as Q=at−bt2. The total heat produced in R is The charge flowing through a resistance R varies with time t as Q=at−bt2. The total heat produced in R is August 22, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 Years Solved [...]
Two batteries, one of emf 18 volts and internal resistance 2Ω and the other of emf 12 volt and internal resistance 1Ω, are connected as shown.The voltmeter V will record a reading of:
22
Aug
Two batteries, one of emf 18 volts and internal resistance 2Ω and the other of emf 12 volt and internal resistance 1Ω, are connected as shown.The voltmeter V will record a reading of: are connected as shown.The voltmeter V will record a reading of one of emf 18 volts and internal resistance 2Ω and the [...]
Two cells having the same emf are connected in series through an external resistance R. Cells have internal resistances r1 and r2 such that (r1 r2) respectively. When the circuit is closed, the potential difference across the first cell is zero, then the value of R is
22
Aug
Two cells having the same emf are connected in series through an external resistance R. Cells have internal resistances r1 and r2 such that (r1 r2) respectively. When the circuit is closed, the potential difference across the first cell is zero, then the value of R is the potential difference across the first cell is [...]
A student measures the terminal potential difference (V) of a cell ( of emf E and internal resistance r) as a function of the current (I) flowing through it. The slope and intercept of the graph between V and I, then respectively equal to
22
Aug
A student measures the terminal potential difference (V) of a cell ( of emf E and internal resistance r) as a function of the current (I) flowing through it. The slope and intercept of the graph between V and I, then respectively equal to A set of 'n' equal resistors are connected in series to [...]
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Chapter 22 - Current Electricity
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NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
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Physics
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A set of 'n' equal resistors ,
are connected in series to a battery of emf 'E' and internal resistance 'R'. The current drawn is I. Now ,
of value 'R' each ,
the 'n' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of 'n' is? ,
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10Ω is
22
Aug
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10Ω is The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10Ω is August 22, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 [...]
A current of 2A flows through 2Ω resistor when connected across a battery. The same battery supplies a current of 0.5A when connected across a 9Ω resistor. The internal resistance of the battery is
22
Aug
A current of 2A flows through 2Ω resistor when connected across a battery. The same battery supplies a current of 0.5A when connected across a 9Ω resistor. The internal resistance of the battery is A current of 2A flows through 2Ω resistor when connected across a battery. The same battery supplies a current of 0.5A [...]
A set of ‘n’ equal resistors, of value ‘R’ each, are connected in series to a battery of emf ‘E’ and internal resistance ‘R’. The current drawn is I. Now, the ‘n’ resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of ‘n’ is?
22
Aug
A set of ‘n’ equal resistors, of value ‘R’ each, are connected in series to a battery of emf ‘E’ and internal resistance ‘R’. The current drawn is I. Now, the ‘n’ resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of ‘n’ is? A [...]
Posted in:
Chapter 22 - Current Electricity
,
NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
,
Physics
,
Tags:
A set of 'n' equal resistors ,
are connected in series to a battery of emf 'E' and internal resistance 'R'. The current drawn is I. Now ,
of value 'R' each ,
the 'n' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10I. The value of 'n' is? ,
A battery consists of a variable number ′n′ of identical cells (having internal resistance ′r′ each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n?
22
Aug
A battery consists of a variable number ′n′ of identical cells (having internal resistance ′r′ each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n? length l and resistance R is bent into a [...]