Volume 2
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
05
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 ,
A rectangular loop has a sliding connector PQ of length l and resistance RΩ and it is moving with a speed v as shown. The set-up is placed in a uniform magnetic field going into the plane of the paper. The three currents I1, I2 and I are
05
Dec
A rectangular loop has a sliding connector PQ of length l and resistance RΩ and it is moving with a speed v as shown. The set-up is placed in a uniform magnetic field going into the plane of the paper. The three currents I1, I2 and I are In the below circuit the current [...]
If a wire is stretched to make it 0.1 % longer, its resistance will
05
Dec
If a wire is stretched to make it 0.1 % longer, its resistance will If a wire is stretched to make it 0.1 % longer its resistance will December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,
The current in the primary circuit of a potentiometer is 0.2A. The specific resistance and cross section of the potentiometer wire are 4×10^−7 ohm metre and 8×10^−7 m^2 respectively. The potential gradient will be equal to :
05
Dec
The current in the primary circuit of a potentiometer is 0.2A. The specific resistance and cross section of the potentiometer wire are 4×10^−7 ohm metre and 8×10^−7 m^2 respectively. The potential gradient will be equal to : In the below circuit the current in each resistance is December 5, 2020 Category: Arihant Physics by D.C [...]
If 400Ω of resistance is made by adding four 100Ω resistance of tolerance 5%, then the tolerance of the combination is?
05
Dec
If 400Ω of resistance is made by adding four 100Ω resistance of tolerance 5%, then the tolerance of the combination is? If 400Ω of resistance is made by adding four 100Ω resistance of tolerance 5% then the tolerance of the combination is? December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - [...]
Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then error in the value of resistance of the wire is
05
Dec
Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then error in the value of resistance of the wire is In the below circuit the current [...]