- AProportional to momentum.
- BProportional to energy.
- CInversely proportional to momentum.
- DInversely proportional to energy.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A element used for radioactive carbon dating for more than 5600 years is
|
(a) C - 14 |
(b) U - 234 |
(c) U - 238 |
(d) Po - 94 |
A condenser of capacitance 10 μF has been charged to 100 volts. It is now connected to another uncharged condenser in parallel. The common potential becomes 40 volts. The capacitance of another condenser is
|
(a) 15 μF |
(b) 5 μF |
(c) 10 μF |
(d) 16.6 μF |
The clear sky appears blue because:
For the circuit shown, which of the following statements is true
|
(a) With |
|
(b) With |
|
(c) With |
|
(d) With |
When a current passes through a wire whose different parts are maintained at different temperatures, evolution or absorption of heat all along the length of wire is known as
|
(a) Joule effect |
(b) Seebeck effect |
(c) Peltier effect |
(d) Thomson effect |
Which of the following rays has the maximum frequency
|
(a) Gamma rays |
(b) Blue light |
(c) Infrared rays |
(d) Ultraviolet rays |
$\frac{1}{8}$
$\frac{1}{4}$
$4$
$8$
Assertion : Circuit containing capacitors should be handled cautiously even when there is no current.
Reason : The capacitors are very delicate and so quickly break down.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |