1
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Figure below shows a lens of refractive index, $$\mu=1.4$$. $$C_1$$ and $$C_2$$ are the centres of curvature of the two faces of the lens of radii of curvature $$4 \mathrm{~cm}$$ and $$8 \mathrm{~cm}$$ respectively.

COMEDK 2024 Evening Shift Physics - Ray Optics Question 12 English

The lens behaves as a

A
diverging lens of focal length $$20 \mathrm{~cm}$$
B
converging lens of focal length $$20 \mathrm{~cm}$$
C
converging lens of focal length $$12 \mathrm{~cm}$$
D
diverging lens of focal length $$12 \mathrm{~cm}$$
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The temperature of a wire is doubled. The Young's modulus of elasticity

A
Will decrease
B
Will also double
C
Will become four times
D
Will remain the same
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A wire of length $$2 \mathrm{~m}$$ carries a current of $$1 \mathrm{~A}$$ along the $$\mathrm{x}$$ axis. A magnetic field $$B=B_0(i+j+k)$$ tesla exists in space. The magnitude of magnetic force on the wire is

A
2B$$_0$$ N
B
Zero
C
3B$$_0$$ N
D
2$$\sqrt2$$B$$_0$$ N
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The dimension $$[\mathrm{ML}^{-1} \mathrm{~T}^{-2}]$$ is the physical quantity of

A
Pressure $$\times$$ Area
B
$$\mathrm{\frac{Force}{Pressure}}$$
C
Power $$\times$$ Time
D
Energy density
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