Atorch bulb rated is `4.5W1.5V` is connected as shwon in the figure. The emc (in `V`) of the cell needed to make the bulb glow at full intensity is:

Six similar bulbs are connected as shown in the figure with a DC source of emf E, 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 A and one from section B are glowing, will be : (a) 2: 1 (b) 4 : 9 (c) 9 : 4 (d) 1 : 2

If a bulb rated as (25W-220V) is connected in series to another bulb rated as (100W-220v) to 220 volt, then which bulb will give more illumination.

A 100 W bulb B_(1) and two 60W bulbs B_(2) and B_(3) , are connected to a 250 V source as shown in the figure . Now W_(1) , W_(2) and W_(3) are the output powers of the bulbs B_(1) , B_(2) and B_(3) respectively, then

Connection of two cells of 1.5 V is shown in the following figure: What is the voltage between the points A and B?

Three identical balls eah of mass m=0.5 kg are connected with each other as shwon in figure and rest over a smooth horizontal table At moment t=0, ball B is imparted a horizontal velocity v_(0)=9ms^(-1) calcualte velocity of A just before it collides with ball C.

A light bulb is rated 100W for a 220V supply. The resistance of the bulb and the peak voltage of the source respectively are

Several electric bulbs designed to be used on a 220V electric supply line are rated 10 W. How many bulbs can be connected in parallel with each other across the two wires of 220V line if the maximum allowable current is 5 A ?

A bulb of 100 W is connected in parallel to an ideal inductance of 1H. This arrangement is connected to a 90 V barrery through a switch. On pressing the switch the

Two electric bulbs are connected one by one across potential difference V At that time power consumed in them are P_1 and P_2 respectively. Now, if potential difference V is applied across series combination of these bulbs, what will be total power consumed ?

When connected across the terminals of a cell, a voltmeter measures 5 V and a connected ammeter measures 10 A of current. A resistance of 2 ohm s is connected across the terminals of the cell. The current flowing through this resistance will be