1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
An electron having mass m and kinetic energy E anter in uniform magnetic field B perpendiculaly, then its frequency will be
A
$${{eE} \over {qvB}}$$
B
$${{2\pi m} \over {eB}}$$
C
$${{eB} \over {2\pi m}}$$
D
$${{2m} \over {eBE}}$$
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A dipole of dipole moment $$\overrightarrow p $$ is placed in uniform electric field $$\overrightarrow E $$ then torque acting on it is given by
A
$$\overrightarrow \tau = \overrightarrow p .\overrightarrow E $$
B
$$\overrightarrow \tau = \overrightarrow p \times \overrightarrow E $$
C
$$\overrightarrow \tau = \overrightarrow p + \overrightarrow E $$
D
$$\overrightarrow \tau = \overrightarrow p - \overrightarrow E $$
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Tangent galvanometer is used to measure
A
potential difference
B
current
C
resistance
D
charge
4
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A capacitor of capacity C has reactance X. If capacitance and frequency become double then reactance will be
A
4X
B
X/2
C
X/4
D
2X