1
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The gravitational field in a region is given by $$\mathbf{E}=5 \mathrm{~N} / \mathrm{kg} \hat{\mathbf{i}}+12 \mathrm{~N} / \mathrm{kg} \hat{\mathbf{j}}$$. The change in the gravitational potential energy of a particle of mass $$1 \mathrm{~kg}$$ when it is taken from the origin to a point ($$5 \hat{\mathbf{i}}-5 \hat{\mathbf{j}}$$) is

A
$$71 \mathrm{~J}$$
B
$$13 \sqrt{58} \mathrm{~J}$$
C
$$-71 \mathrm{~J}$$
D
$$35 \mathrm{~J}$$
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

Two parallel conductors carry current in opposite directions as shown in the figure. One conductor carries a current of $$20 \mathrm{~A}$$. Point $$C$$ is a distance $$d / 2$$ to the right of a 20 A current. If $$d=18 \mathrm{~cm}$$ and $$i$$ is adjusted so that the magnetic field at $$C$$ is zero, the value of the current $$i$$ is

VITEEE 2023 Physics - Moving Charges and Magnetism Question 8 English

A
100 A
B
60 A
C
80 A
D
98 A
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The activity of a radioactive sample is measured as No counts per minute at $$t=0$$ and $$\mathrm{N}_0 / \mathrm{e}$$ counts per minute at $$t=6 \mathrm{~min}$$. The time (in minutes) at which the activity reduces to half its value is.

A
$$\left(\log _e 2\right) / 6$$
B
$$6 / \log _e 2$$
C
$$6 \log _0 2$$
D
$$6 \log _e 2$$
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

A ball is allowed to fall from a height of $$10 \mathrm{~m}$$. If there is $$30 \%$$ loss of energy due to impact, then after one impact ball will go up to.

A
10 m
B
8 m
C
4 m
D
7 m
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