Energy of the photons
Maximum Kinetic energy of the ejected electrons
Threshold frequency of the photons
Stopping potential of the electrons
Velocity of the electrons
Correct answer is B
No explanation has been provided for this answer.
| 24 Na → | 24 mg4 + X + energy |
|---|---|
| 11 | 2 |
Alpha particle
Beta particle
Gamma ray
X-ray
Neutron
Correct answer is B
No explanation has been provided for this answer.
84s
112s
168s
280s
616s
Correct answer is C
Heat energy = Elect. energy
mc\(\theta\) = power x time
1 x 4200 x (70 - 40) = 750 x t
t = 168s
16.00A
4.00A
0.50A
0.25A
0.06A
Correct answer is B
I\(^2\)Rt = mI;
I = \(\sqrt{\frac{mI}{Rt}}\)
= \(\sqrt{\frac{10 \times 336}{10 \times 21}}\)
= \(\sqrt{16}\)
= 4.0A
Electric motor primarily converts
electrical energy into chemical energy
electrical energy into heat energy
kinetic energy into potential energy
electrical energy into mechanical energy
mechanical energy into light energy
Correct answer is D
No explanation has been provided for this answer.