1
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

In communication system, a repeater is used to extend the range to transmission. It is the combination of

A
IF stage and amplifier
B
rectifier and detector
C
receiver and transmitter
D
modulator and power amplifier
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two wires of different materials have same length $$L$$ and same diameter $$d$$. The second wire is connected at the end of the first wire and forms one single wire of double the length. This wire is subjected to stretching force $$F$$ to produce the elongation I. The two wires have

A
different stress but same strain
B
different stress and different strain
C
same stress but different strain
D
same stress and same strain
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

When wavelength of light used in optical instruments A and B are 4500$$\mathop A\limits^o $$ and 6000$$\mathop A\limits^o $$ respectively, the ratio of resolving power of A to B will be

A
9 : 16
B
16 : 9
C
7 : 1
D
4 : 3
4
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

The light of wavelength $$\lambda$$ incident on the surface of metal having work function $$\phi$$ emits the electrons. The maximum velocity of electrons emitted is [ $$c=$$ velocity of light, $$h=$$ Planck's constant, $$m=$$ mass of electron]

A
$$\left[\frac{2(h v-\phi) \lambda}{m c}\right]$$
B
$$\left[\frac{2(h c-\lambda \phi)}{m \lambda}\right]^{1 / 2}$$
C
$$\left[\frac{2(h c-\lambda)}{m \lambda}\right]^{1 / 2}$$
D
$$\left[\frac{2(h c-\phi)}{m \lambda}\right]$$
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