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Nuclear Energy

1 kg of can l...

Question

1 kg of ________ can light up $1$ bulb for $3 \times 10^{4}$ years.

A

Uranium

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B

Halonium

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C

Neutronium

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D

Hydronium

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Solution

The correct option is A Uranium
1 kg of coal can light the bulb for 8 hours whereas 1 kg of uranium can light the bulb for 3 x 10 $^{4}$ years.

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1 kg coal can light up 1 bulb for _____ hours.

A bulb rated 240 V, 100 W is connected to a 120 V supply. What can be inferred?

Q. A light bulb, a capacitor and a battery are connected together as shown here, with switch

S

initially open. When the switch

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Q. A 12-volt battery is connected to two light bulbs, as drawn in figure 1 light bulb 1 has resistance 3 ohms, while light bulb 2 has resistance 6 ohms. The battery has essentially no internal resistance, and all the wires are essentially resistanceless, too. When a light bulb is unscrewed, no current flows through that branch of the circuit. For instance, if light bulb 2 is unscrewed, current flows only around the lower loop of the circuit, which consist of the battery and light bulb 1. The more current flows through a light bulb, their equivalent resistance is

R_{e q} = R_{1} + R_{2}

. By contrast, when two reisistors are wired in parallel, their net resisance is given by

\frac{1}{R_{e q}} = \frac{1}{R_{1}} + \frac{1}{R_{2}}

Bulb 2 is now screwed in as a result, bulb 1 :

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and two identical bulbs

B_{1}

B_{2}

are connected to a battery through a switch

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as shown in the figure. The resistance of coil having inductance

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. Which of the following statement gives the correct description of the happenings, when the switch

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