Chapter 3 – Current Electricity
Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval,
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Dec
Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval, Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the [...]
The charge flowing in a conductor varies with times as Q=at−bt^2. Then, the current 1. decreases linearly with time 2. reaches a maximum and then decreases 3. falls to zero at time t=a/2b 4. changes at a rate – 2b
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Dec
The charge flowing in a conductor varies with times as Q=at−bt^2. Then, the current 1. decreases linearly with time 2. reaches a maximum and then decreases 3. falls to zero at time t=a/2b 4. changes at a rate – 2b The charge flowing in a conductor varies with times as Q=at−bt^2. Then the current 1. [...]
Three resistances A, B and C have values 3R, 6R and R respectively. When some potential difference is applied across the network the thermal power dissipated by A, B and C are in ratio:
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Dec
Three resistances A, B and C have values 3R, 6R and R respectively. When some potential difference is applied across the network the thermal power dissipated by A, B and C are in ratio: 6R and R respectively. When some potential difference is applied across the network the thermal power dissipated by A B and [...]
The power dissipated 6 ohm resistor is
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Dec
The power dissipated 6 ohm resistor is The power dissipated 6 ohm resistor is December 2, 2020 Category: Cengage NEET by C.P Singh , Chapter 3 - Current Electricity , Part 2 ,
Water of volume 2 litre in a container is heated with a coil of 1kW at 27^∘C. The lid of the container is open and energy dissipates at rate of 160J/s. In how much time temperature will rise from 27^∘C to 77^∘C [Given specific heat of water is 4.2kJ/kg degree C]
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Dec
Water of volume 2 litre in a container is heated with a coil of 1kW at 27^∘C. The lid of the container is open and energy dissipates at rate of 160J/s. In how much time temperature will rise from 27^∘C to 77^∘C [Given specific heat of water is 4.2kJ/kg degree C] If the current in [...]
In the previous problem, if the coils are connected in parallel, the time taken will be
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Dec
In the previous problem, if the coils are connected in parallel, the time taken will be if the coils are connected in parallel In the previous problem the time taken will be December 2, 2020 Category: Cengage NEET by C.P Singh , Chapter 3 - Current Electricity , Part 2 ,
Two heater coils separately take 10 minute and 5 minute to boil certain amount of water. If both the coils are connected in series, the time taken will be
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Dec
Two heater coils separately take 10 minute and 5 minute to boil certain amount of water. If both the coils are connected in series, the time taken will be the time taken will be Two heater coils separately take 10 minute and 5 minute to boil certain amount of water. If both the coils are [...]
For ensuring dissipation of same energy in all three resistors (R1,R2,R3) connected as shown in figure, their values must be related as
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Dec
For ensuring dissipation of same energy in all three resistors (R1,R2,R3) connected as shown in figure, their values must be related as For ensuring dissipation of same energy in all three resistors ( R1 R2 R3 ) connected as shown in figure their values must be related as December 2, 2020 Category: Cengage NEET by [...]
You are given a resistance coil and a battery. In which of the following cases is largest amount of heat generated?
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Dec
You are given a resistance coil and a battery. In which of the following cases is largest amount of heat generated? You are given a resistance coil and a battery. In which of the following cases is largest amount of heat generated? December 2, 2020 Category: Cengage NEET by C.P Singh , Chapter 3 - [...]
A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if
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Dec
A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if December 2, 2020 [...]