The equation
is
|
(a) b -emission |
(b) a -emission |
(c) e– capture |
(d) Fission |
The equation
is
|
(a) b -emission |
(b) a -emission |
(c) e– capture |
(d) Fission |
(a) b -emission
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Capacitance (in F) of a spherical conductor with radius 1m is
|
(a) 1.1 |
(b) |
(c) 9 × |
(d) |
Twelve wires of equal length and same cross-section are connected in the form of a cube. If the resistance of each of the wires is R, then the effective resistance between the two diagonal ends would be
|
(a) 2 R |
(b) 12 R |
(c) |
(d) 8 R |
Which of the following gives the value of magnetic field according to, Biot-Savart’s law’
|
(a) |
(b) |
(c) |
(d) |
The combination of the gates shown in the figure below produces
|
(a) NOR gate |
(b) OR gate |
(c) AND gate |
(d) XOR gate |
Assertion : Lenz’s law violates the principle of conservation of energy.
Reason : Induced e.m.f., opposes always the change in magnetic flux responsible for its production.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If assertion is false but reason is true. |
Five resistors of given values are connected together as shown in the figure. The current in the arm BD will be
|
(a) Half the current in the arm ABC |
(b) Zero |
|
(c) Twice the current in the arm ABC |
(d) Four times the current in the arm ABC |
The half life of
is 8 days. Given a sample of
at time t = 0, we can assert that
|
(a) No nucleus will decay before t = 4 days |
|
(b) No nucleus will decay before t = 8 days |
|
(c) All nuclei will decay before t = 16 days |
|
(d) A given nucleus may decay at any time after t = 0 |