1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

An organ pipe filled with a gas at 27$$^\circ$$C resonates at 400 Hz in its fundamental mode. If it is filled with the same gas at 90$$^\circ$$C, the resonance frequency at the same mode will be

A
512 Hz
B
420 Hz
C
440 Hz
D
484 Hz
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

The collector current in a common base amplifier using n-p-n transistor is 24 mA. If 80% of the electrons released by the emitter is accepted by the collector, then the base current is numerically :

A
3 mA and entering the base
B
6 mA and leaving the base
C
3 mA and leaving the base
D
6 mA and entering the base
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The sliding contact C is at one fourth of the length of the potentiometer wire (AB) from A as shown in the circuit diagram. If the resistance of the wire AB is R0, then the potential drop (V) across the resistor R is

NEET 2022 Phase 2 Physics - Current Electricity Question 9 English

A
$${{2{V_0}R} \over {2{R_0} + 3R}}$$
B
$${{4{V_0}R} \over {3{R_0} + 16R}}$$
C
$${{4{V_0}R} \over {3{R_0} + R}}$$
D
$${{2{V_0}R} \over {4{R_0} + R}}$$
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