An uncharged particle is moving with a velocity in non-uniform magnetic field as shown.
velocity would be
Maximum at A & B
Minimum at A & B
Maximum at M
same at all points
Which of the following is true regarding diamagnetic substaces symbols ( symbols have their usual meaning)
μ > 1, χm > 1
μ > 1, χm < 1
μr < 1, χm < 1
μ >1, χm < 1
A galvanometer has a current sensitivity of 1 mA per division. A variable shunt is connected across the galvanometer and the combination is put in series with a resistance of 500 Ω and cell of internal resistance 1 Ω It gives a deflection of 5 division for shunt of 5 ohm and 20 division for shunt of 25 ohm. The emf of cell is
47.1 V
57.1 V
67.1 V
77.1 V
A circular coil with a cross-sectional area of 4 cm2 has 10 turns. It is placed at the center of a long solenoid that has 15 turns/cm and a cross-sectional area of IO cm2, as shown in the figure. The axis of the coil conicides with the axis of the solenoid. What is their mutual inductance?
7.54 μH
8.54 μH
9.54 μH
10.54 μH
An electric charge 10-3 μC is placed at the origin (0,0) of (x-y) co-ordinate system. Two points A and B are situated at and (2,0) respectively. The potential difference between the points A and B will be
4.5 volt
9 volt
Zero
2 volt
Alternating current cannot be measured by D.C ammeter because
A.C cannot pass through D.C parameter
A.C changes direction
average value of current for complete cycle is zero
D.C ammeter will get changed
The core of any transformer is laminated so as to
reduce the energy loss due to eddy currents
make it light weight
make it robust & strong
D.C ammeter will get damaged
Assertion: An electric field is preferred in comparison to magnetic field for detecting the electron beam in a television picture tube.
Reason: Electric field requires low voltage.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false.
D.
If both assertion and reason are false.
If electric field is used for detecting the electron beam, then very high voltage will have to be applied or very long tube will have to be taken.