Arihant Physics by D.C Pandey
The current I drawn from the 5 V source will be
05
Dec
The current I drawn from the 5 V source will be The current I drawn from the 5 V source will be December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,
In a Wheatstone bridge, three resistances P, Q and R are connected in the three arms and the fourth arm is formed by two resistances S1 and S2 connected in parallel. The condition for the bridge to be balanced will be
05
Dec
In a Wheatstone bridge, three resistances P, Q and R are connected in the three arms and the fourth arm is formed by two resistances S1 and S2 connected in parallel. The condition for the bridge to be balanced will be In a Wheatstone bridge Q and R are connected in the three arms [...]
The resistance of a bulb filament is 100Ω at a temperature at 100^o C. If its temperature coefficient of resistance be 0.005/ degree C, then its resistance will become 200Ω at a temperature of
05
Dec
The resistance of a bulb filament is 100Ω at a temperature at 100^o C. If its temperature coefficient of resistance be 0.005/ degree C, then its resistance will become 200Ω at a temperature of The resistance of a bulb filament is 100Ω at a temperature at 100^o C. If its temperature coefficient of resistance be [...]
An electric bulb is rated 220 volt-100 watt, Power consumed by it when operated on 110 volt will be :
05
Dec
An electric bulb is rated 220 volt-100 watt, Power consumed by it when operated on 110 volt will be : An electric bulb is rated 220 volt-100 watt Power consumed by it when operated on 110 volt will be : December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity [...]
A material ‘B’ has twice the specific resistance of ‘A’. A circular wire made of ‘B’ has twice the diameter of a wire made of ‘A’. Then for the two wires to have the same resistance, the ratio lB/lA of their respective lengths must be
05
Dec
A material ‘B’ has twice the specific resistance of ‘A’. A circular wire made of ‘B’ has twice the diameter of a wire made of ‘A’. Then for the two wires to have the same resistance, the ratio lB/lA of their respective lengths must be A material 'B' has twice the specific resistance of 'A'. [...]
The resistance of a wire is 5 ohm at 50^∘C and 6 ohm at 100^∘C. The resistance of the wire at 0^∘C will be
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Dec
The resistance of a wire is 5 ohm at 50^∘C and 6 ohm at 100^∘C. The resistance of the wire at 0^∘C will be The resistance of a wire is 5 ohm at 50^∘C and 6 ohm at 100^∘C. The resistance of the wire at 0^∘C will be December 5, 2020 Category: Arihant Physics by [...]
A 5V battery with internal resistance 2Ω and a 2V battery with internal resistance 1Ω are connected to a 10Ω resistor as shown in the figure.
05
Dec
A 5V battery with internal resistance 2Ω and a 2V battery with internal resistance 1Ω are connected to a 10Ω resistor as shown in the figure. A 5V battery with internal resistance 2Ω and a 2V battery with internal resistance 1Ω are connected to a 10Ω resistor as shown in the figure. December 5, 2020 [...]
Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown resistor R is
05
Dec
Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown resistor R is Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown resistor R is December 5, 2020 Category: Arihant Physics by [...]
Statement-1: The temperature dependence of resistance is usually given as R=R0(1+αΔT). The resistance of a wire changes from 100Ω→150Ω when its temperature is increased from 27^∘C to 227^∘C. This implies that α=2.5×10^−3/∘C. Statement 2: R=Ri(1+αΔT) is valid only when the change in the temperature ΔT is small and ΔR=(R−R0)
05
Dec
Statement-1: The temperature dependence of resistance is usually given as R=R0(1+αΔT). The resistance of a wire changes from 100Ω→150Ω when its temperature is increased from 27^∘C to 227^∘C. This implies that α=2.5×10^−3/∘C. Statement 2: R=Ri(1+αΔT) is valid only when the change in the temperature ΔT is small and ΔR=(R−R0) In the below circuit the current [...]
In the circuit shown below, the key K is closed at t=0. The current through the battery is
05
Dec
In the circuit shown below, the key K is closed at t=0. The current through the battery is In the circuit shown below the key K is closed at t=0. The current through the battery is December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,