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Questions and Answers
A current of 1 A flows in a conductor. If the charge of an electron is 1.6 × 10^(-19) C, then the number of electrons flowing through the conductor in 1 second is:
A current of 1 A flows in a conductor. If the charge of an electron is 1.6 × 10^(-19) C, then the number of electrons flowing through the conductor in 1 second is:
- 3.75 × 10^19
- 3.75 × 10^18
- 6.25 × 10^19
- 6.25 × 10^18 (correct)
A wire of resistance R is stretched to twice its length. The new resistance of the wire will be:
A wire of resistance R is stretched to twice its length. The new resistance of the wire will be:
- 2R
- R/2
- 4R (correct)
- R
In a series R-C circuit, the voltage across the resistance and the voltage across the capacitor are 80 V and 120 V respectively. The supply voltage is:
In a series R-C circuit, the voltage across the resistance and the voltage across the capacitor are 80 V and 120 V respectively. The supply voltage is:
- 200 V
- 160 V
- 140 V
- 156.32 V (correct)
A resistor of 2 ohm is connected in series with a capacitor of 4 microfarad. The angular frequency of the AC source is 100 rad/s. The impedance of the circuit is
A resistor of 2 ohm is connected in series with a capacitor of 4 microfarad. The angular frequency of the AC source is 100 rad/s. The impedance of the circuit is
In a circuit, the current I is related to the voltage V by the equation I = 2V. The resistance of the circuit is:
In a circuit, the current I is related to the voltage V by the equation I = 2V. The resistance of the circuit is:
A current of 2 A flows through a resistance of 4 ohm. The power dissipated in the resistor is
A current of 2 A flows through a resistance of 4 ohm. The power dissipated in the resistor is
A capacitor of 2 microfarad is charged to 100 V. The energy stored in the capacitor is
A capacitor of 2 microfarad is charged to 100 V. The energy stored in the capacitor is
A current of 1 A flows through a resistor of 4 ohm. The voltage across the resistor is
A current of 1 A flows through a resistor of 4 ohm. The voltage across the resistor is
A circuit consists of a resistor of 2 ohm in series with an inductor of 1 henry. The angular frequency of the AC source is 100 rad/s. The impedance of the circuit is
A circuit consists of a resistor of 2 ohm in series with an inductor of 1 henry. The angular frequency of the AC source is 100 rad/s. The impedance of the circuit is
