Heating Effects Of Current

The power dissipated across the resistor in the circuit shown here is . The power dissipated in watts across the resistor is:

1.		2.
3.		4.

The total power dissipated in watts in the circuit shown below is:

1.	W	2.	W
3.	W	4.	W

A current of flows through the resistor shown in the circuit. The power dissipated in the resistor is:

If power dissipated in the resistor in the circuit shown is W, the potential difference across the resistor will be:

If the voltage across a bulb rated drops by of its rated value, the percentage of the rated value by which the power would decrease is:
1.
2.
3.
4.

A filament bulb is to be used in a main supply. When a resistance is connected in series, the bulb works perfectly and consumes The value of is:

1.		2.	$\mathrm{}$
3.	$\mathrm{}$	4.	$\mathrm{}$

Which of the following acts as a circuit protection device?

1.	Fuse	2.	Conductor
3.	Inductor	4.	Switch

Six similar bulbs are connected as shown in the figure with a DC source of emf and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section and one from section are glowing, will be:

1.		2.
3.		4.

Two resistors of resistance, and are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in resistor to that in resistor in a given time is:

1.		2.
3.		4.

Two heaters and have power rating of and , respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is:

1.		2.
3.		4.