1
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

In which of the following photoelectric effect is not observed?

A
Potassium
B
Rubidium
C
Magnesium
D
Cesium
2
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

An electrically heated coil is immersed in a calorimeter containing $$360 \mathrm{~g}$$ of water at $$10^{\circ} \mathrm{C}$$. The coil consumes energy at the rate of $$90 \mathrm{~W}$$. The water equivalent of calorimeter and coil is $$40 \mathrm{~g}$$. The temperature of water after $$10 \mathrm{~min}$$ is

A
$$4.214^{\circ} \mathrm{C}$$
B
$$42.14^{\circ} \mathrm{C}$$
C
$$30^{\circ} \mathrm{C}$$
D
$$45.18^{\circ} \mathrm{C}$$
3
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

A quantity $X$ is given by $$\frac{\varepsilon_0 A}{L} \frac{\Delta V}{\Delta t}$$, where $$\varepsilon_0$$ is the permittivity of free space, $$L$$ is the length, $$A$$ is area, $$\Delta V$$ is the potential difference and $$\Delta t$$ is time interval. The dimensional formula for $$X$$ is the same as that of

A
resistance
B
charge
C
voltage
D
current
4
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

A nuclide at rest emits an $\alpha$-particle. In this process

A
$$\alpha$$-particle moves with large velocity and the nucleus remains at rest.
B
Both $$\alpha$$-particle and nucleus move with equal speed in opposite directions.
C
Both move in opposite directions except $$\alpha$$-particle with greater speed.
D
Both move in opposite direction with greater velocity of $$\alpha$$-particle.
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