The number of protons in a copper atom are 2 9 11 29

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Question
The number of protons in a copper atom are
Options
A. 2
B. 9
C. 11
D. 29

Correct Answer

29

More questions

1. Assertion (A): For elemental dielectrics, P = Na_eE_i where N is number of atoms/m³, P is polarization, a_e is electronic polarization and E_i is internal electric field.
Reason (R): In elemental dielectrics there are no permanent dipoles or ions.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

2. Match the following:

	List I (Diode circuit)		List II (Name of the circuit)
A.		1.	Positive limiter
B.		2.	Positive clamper
C.		3.	Negative clamper

Options
A. A-2, B-3, C-1
B. A-1, B-2, C-3
C. A-2, B-1, C-3
D. A-3, B-1, C-2

3. Match the following:

	List I		List II
A.	FM	1.	slope-overload
B.	DM	2.	? law
C.	PSK	3.	Envelope detector
D.	PCM	4.	Capture effect
		5.	Hilbert transform
		6.	Matched filter.

Options
A. A-5, B-1, C-6, D-4
B. A-4, B-6, C-1, D-5
C. A-4, B-1, C-6, D-2
D. A-6, B-3, C-4, D-2

4. Match the following:

	List I		List II
A.	Ratio of maximum energy stored to energy dissipated per cycle	1.	Propagation constant
B.	TEM mode is loss less medium	2.	Cutoff frequency is zero
C.	Ratio of frequency in radian to phase velocity of EM wave	3.	Quality factor of cavity
D.	TEM is the mode of lowest cutoff frequency	4.	Cylindrical waveguide

Options
A. A-3, B-2, C-4, D-1
B. A-2, B-3, C-1, D-4
C. A-3, B-2, C-1, D-4
D. A-2, B-3, C-4, D-1

5.

	List I (Branches)		List II
A.	1, 2, 3, 4	1.	Twigs
B.	4, 5, 6, 7	2.	Links
C.	1, 2, 3, 8	3.	Fundamental cutset
D.	1, 4, 5, 6, 7	4.	Fundamental loop

Options
A. A-3, B-1, C-2, D-4
B. A-2, B-3, C-1, D-4
C. A-3, B-2, C-4, D-1
D. A-1, B-4, C-3, D-2

6. Match the following:

List I List II

A. 1. Non-minimum phase

B. 2. Minimum phase

C. 3. All pass system
Options
A. A-1, B-3, C-2
B. A-3, B-1, C-2
C. A-3, B-2, C-1
D. A-2, B-1, C-3

7. Assertion (A): In many materials, dielectric polarization causes mechanical distortion.
Reason (R): If dielectric polarization causes mechanical distortion then mechanical distortion must cause dielectric polarization.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

8. Assertion (A): When cathode temperature is increased from 2500 K to 2550 K, thermionic emission current may increase by about 50%.
Reason (R): Thermionic emission current ? T² e^-Ew/kT.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

9. Assertion (A): Ionic solids, in general, have no electrical conductivity.
Reason (R): In ionic solids, electrons are tightly bound to the nucleus.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

10. Assertion (A): An electron having charge - e and mass m and lying in an electric field E is subjected to an acceleration - (e/m) E.
Reason (R): If there are n electrons/m³ moving with velocity v_x and each electron has a charge - e, the current density J = - n ev_x.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

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