- A34
- B35.5
- C35
- DFind the accurate expressions.
Explanation:
Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them.
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A galvanometer coil of resistance 50 W, show full deflection of 100 μA. The shunt resistance to be added to the galvanometer, to work as an ammeter of range 10 mA is
|
(a) 5 W in parallel |
(b) 0.5 W in series |
(c) 5 W in series |
(d) 0.5 W in parallel |
Amplification factor of a triode is 10. When the plate potential is 200 volt and grid potential is – 4 volt, then the plate current of 4mA is observed. If plate potential is changed to 160 volt and grid potential is kept at – 7 volt, then the plate current will be
|
(a) 1.69 mA |
(b) 3.95 mA |
(c) 2.87 mA |
(d) 7.02 mA |
The forbidden energy band gap in conductors, semiconductors and insulators are and
respectively. The relation among them is
|
(a) |
(b) |
|
(c) |
(d) |
The decay constant λ of the radioactive sample is the probability of decay of an atom in unit time, then
|
(a) λ decreases as atoms become older |
|
(b) λ increases as the age of atoms increases |
|
(c) λ is independent of the age |
|
(d) Behaviour of λ with time depends on the nature of the activity |
The oscillating electric and magnetic vectors of an electromagnetic wave are oriented along
|
(a) The same direction but differ in phase by 90° |
|
(b) The same direction and are in phase |
|
(c) Mutually perpendicular directions and are in phase |
|
(d) Mutually perpendicular directions and differ in phase by 90° |
A circular loop of radius 0.0157m carries a current of 2.0 amp. The magnetic field at the centre of the loop is (![]()
|
(a) 1.57 |
(b) 8.0 |
|
(c) 2.5 |
(d) 3.14 |

A battery of internal resistance 4W is connected to the network of resistances as shown. In order to give the maximum power to the network, the value of R (in Ω) should be
|
(a) 4/9 |
(b) 8/9 |
(c) 2 |
(d) 18 |