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- 1. Multiple Choice
The heating element of an electric iron is made up of:
copper
nichrome
aluminium
iron
- 2. Multiple Choice
Electrical resistivity of any given metallic wire depends upon
its thickness
its shape
nature of the material
its length
- 3. Fill in the Blank
Electric power is inversely proportional to
- 4. Multiple Choice
In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be
Same in all the cases
Maximum in case (i)
Maximum in case (ii)
Maximum in case (iii)
- 5. Multiple Choice
A current of 0.5 A is drawn by a filament of an electric bulb. Number of electron passing through a cross-section of the filament in 32 seconds would be roughly
1018
1016
1020
1023
- 6. Multiple Choice
What is the minimum resistance which can be made using five resistors each of 1/2 Ω?
1/5
1/25
1/10
25
- 7. Multiple Choice
The proper representation of series combination of cells obtaining maximum potential is
i
ii
iii
iv
- 8. Multiple Choice
A student carries out an experiment and plots the V ‒ I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively as shown in figure. Which of the following is true?
R1 = R2 = R3
R1 > R2 > R3
R3 > R2 > R1
R2 > R3 > R1
- 9. Multiple Choice
In an electrical circuit, two resistors of 1/2 and 1/4 respectively are connected in series to a 6V battery. The heat dissipated by the 1/4 resistor in 5s will be
20J
40J
80J
160J
- 10. Fill in the Blank
If the potential difference across the ends of a conductor is doubled, the current flowing through it, gets ………
- 11. Multiple Choice
Calculate the R equivalent ?
4Ω
6Ω
9Ω
18Ω
- 12. Multiple Choice
V1, V2 and V3 are the PD across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A.
V1 =1, V2 = 2 and V3 = 3
V1 =5, V2 = 10 and V3 = 15
V1 =5, V2 = 2.5 and V3 = 1.6
V1 =4, V2 = 3 and V3 = 2
- 13. Multiple Choice
If the zeroes of the quadratic polynomial x2 + bx + c , c ≠ 0are equal, then
c and a have opposite signs
c and b have opposite signs
c and a have the same sign
c and b have the same sign
- 14. Multiple Choice
The degree of the polynomial (x + 1)(x2 – x – x4 +1) is:
2
3
5
6
- 15. Multiple Choice
If the zeroes of the quadratic polynomial x2 + (a + 1)x + b are 2 and –3, then
a = –7, b = –1
a = 5, b = –1
a = 2, b = – 6
a = 0, b = – 6
- 16. Multiple Choice
If one of the zeroes of the cubic polynomial x3 + ax2 + bx + c is –1, then the
Product of the other two zeroes is
b – a + 1
b – a – 1
a – b + 1
a – b –1
- 17. Multiple Choice
The zeroes of the quadratic polynomial x2 + kx + k where, k ≠ 0.
cannot both be positive
cannot both be negative
are always unequal
are always equal
- 18. Multiple Choice
If one of the zeroes of a quadratic polynomial of the form x2 + ax + b is the negative of the other, then it
has no linear term and the constant term is negative
has no linear term and the constant term is positive
can have a linear term but the constant term is negative
can have a linear term but the constant term is positive
- 19. Multiple Choice
Which of the following is not the graph of a quadratic polynomial?
a
b
c
d
- 20. Multiple Choice
The value of p for which the polynomial x3 + 4x2 –px + 8 is exactly divisible by (x – 2) is:
0
3
15
16
- 21. Multiple Choice
If sum of the squares of zeroes of the quadratic polynomial 6x2 + x + k is 25/36, the value of k is:
4
– 4
2
– 2
- 22. Multiple Choice
If α and β are zeroes of x2 – 4x + 1, then 1/α + 1/β – αβ is
3
5
–5
–3
- 23. Multiple Choice
If α, β are zeroes of x2 –6x + k, what is the value of k if 3α + 2β = 20?
(A)–16
(B) 8
(C) 2
(D) –8
– 16
8
2
–8
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