1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?
A
four times
B
one-fourth
C
zero
D
doubled
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The color code of a resistance is given below :
NEET 2020 Phase 1 Physics - Current Electricity Question 24 English
The values of resistance and tolerance, respectively, are
A
47 k$$\Omega $$ , 10%
B
4.7 k$$\Omega $$ , 5%
C
470 $$\Omega $$ , 5%
D
470 k$$\Omega $$ , 5%
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass.
The centre of mass of the system from the 5 kg particle is nearly at a distance of :
A
50 cm
B
67 cm
C
80 cm
D
33 cm
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
For transistor action, which of the following statements is correct?
A
Base, emitter and collector regions should have same size.
B
Both emitter junction as well as the collector junction are forwarded biased.
C
The base region must be very thin and lightly doped.
D
Base, emitter and collector regions should have same doping concentrations.
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