Question

1. A circuit is made of 0.4 ohm wire, a 150 ohm bulb and a 120 ohm rheostat connected in series. Determine the total resistance of the circuit. 2. A 100 W, 250 V lamp is connected in series with a 100 W, 200 V lamp across 250 V supply mains. Calculate (a) the current drawn from the supply mains and (b) voltage across each lamp. Assume lamp résistance constant 3. The equivalent resistance of four resistors joined in parallel is 30 ohms. The current flowing through them are 4, 2, 4/3 and 2/3 amperes. Determine the value of each resistor. 4. If a resistor is to dissipate energy at the rate of 250 W, find the resistance for terminal voltage of 100 V.

          1. A circuit is made of 0.4 ohm wire, a 150 ohm bulb and a 120 ohm rheostat connected in series.
Determine the total resistance of the circuit.
2. A 100 W, 250 V lamp is connected in series with a 100 W, 200 V lamp across 250 V supply mains.
Calculate (a) the current drawn from the supply mains and (b) voltage across each lamp. Assume lamp
résistance constant
3. The equivalent resistance of four resistors joined in parallel is 30 ohms. The current flowing through
them are 4, 2, 4/3 and 2/3 amperes. Determine the value of each resistor.
4. If a resistor is to dissipate energy at the rate of 250 W, find the resistance for terminal voltage of 100
V.

1. A circuit is made of 0.4 ohm wire, a 150 ohm bulb and a 120 ohm rheostat connected in series.
Determine the total resistance of the circuit.
2. A 100 W, 250 V lamp is connected in series with a 100 W, 200 V lamp across 250 V supply mains.
Calculate (a) the current drawn from the supply mains and (b) voltage across each lamp. Assume lamp
résistance constant
3. The equivalent resistance of four resistors joined in parallel is 30 ohms. The current flowing through
them are 4, 2, 4/3 and 2/3 amperes. Determine the value of each resistor.
4. If a resistor is to dissipate energy at the rate of 250 W, find the resistance for terminal voltage of 100
V.

Added by Jacob J.

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