Chapter 3 – Current Electricity
Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 2 > Chapter 3 - Current Electricity
The supply voltage to room is 120V. The resistance of the lead wires is 6Ω. A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240W heater is switched on in parallel to the bulb?
05
Dec
The supply voltage to room is 120V. The resistance of the lead wires is 6Ω. A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240W heater is switched on in parallel to the bulb? The supply voltage to room is 120V. The resistance of the [...]
In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1kW. The voltage of the electric mains is 220 V. Then, the minimum current should be
05
Dec
In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1kW. The voltage of the electric mains is 220 V. Then, the minimum current should be 5 bulbs of 100 W 5 fans of 80 W and 1 heater of [...]
In the circuit shown below, the current in the 1 ohm resistor is
05
Dec
In the circuit shown below, the current in the 1 ohm resistor is In the circuit shown below the current in the 1 ohm resistor is : December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,
When 5V potential difference is applied across a wire length 0.1 m, the drift speed of electron is 2.5 ×10^−4 ms^−1. If the electron density in the wire is 8 ×10^28 m^−3 , the resistivity of the material is close to
05
Dec
When 5V potential difference is applied across a wire length 0.1 m, the drift speed of electron is 2.5 ×10^−4 ms^−1. If the electron density in the wire is 8 ×10^28 m^−3 , the resistivity of the material is close to the drift speed of electron is 2.5 ×10^−4 ms^−1. If the electron density in [...]
The temperature dependence of resistance of Cu and undoped Si in the temperature range 300−400K, is best described by :
05
Dec
The temperature dependence of resistance of Cu and undoped Si in the temperature range 300−400K, is best described by : is best described by : The temperature dependence of resistance of Cu and undoped Si in the temperature range 300−400K December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity [...]
In the below circuit, the current in each resistance is
05
Dec
In the below circuit, the current in each resistance is In the below circuit the current in each resistance is December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,
In the given circuit diagram when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be :
05
Dec
In the given circuit diagram when the current reaches steady state in the circuit, the charge on the capacitor of capacitance C will be : In the given circuit diagram when the current reaches steady state in the circuit the charge on the capacitor of capacitance C will be December 5, 2020 Category: Arihant Physics [...]
Which of the following statements is false ? a. In a balance Wheatstone bridge, if the cell and the galvanometer are exchanged , the null point is disturbed
05
Dec
Which of the following statements is false ? a. In a balance Wheatstone bridge, if the cell and the galvanometer are exchanged , the null point is disturbed if the cell and the galvanometer are exchanged the null point is disturbed Which of the following statements is false ? a. In a balance Wheatstone bridge [...]
On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10cm. The resistance of their series combination is 1kΩ. How much was the resistance on the left slot before interchanging the resistances?
05
Dec
On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10cm. The resistance of their series combination is 1kΩ. How much was the resistance on the left slot before interchanging the resistances? On interchanging the resistances the balance point of a meter bridge shifts to the left by 10cm. [...]
In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52cm of the potentiometer wire. If the cell is shunted by a resistance of 5Ω, a balance is found when the cell is connected across 40cm of the wire. Find the internal resistance of the cell.
05
Dec
In a potentiometer experiment, it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52cm of the potentiometer wire. If the cell is shunted by a resistance of 5Ω, a balance is found when the cell is connected across 40cm of the wire. Find the internal [...]
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a balance is found when the cell is connected across 40cm of the wire. Find the internal resistance of the cell. ,
In a potentiometer experiment ,
it is found that no current passes through the galvanometer when the terminals of the cell are connected across 52cm of the potentiometer wire. If the cell is shunted by a resistance of 5Ω ,