2. Which statement about electromagnetic induction is correct? *
A: A strong magnet that is held stationary near a stationary conductor causes a greater effect than a weak magnet
B:The effect occurs when a magnet and a conductor are both moved with the same speed and in the same direction
C:The effect occurs when a magnet and a conductor are both moved with the same speed and in the same direction
D:The effect only occurs when a magnet is moved towards a conductor
Answers
aAnswer the following
1. The common factor of x²y² and x³y³ is
2.The factorisation of 6x – 42 is
3. The value of 492
is
4. The value of (0.68)2 – (0.32)2
is
5.If x = 2, y = -1 then the value of x² -+ 4xy + 4y² is
6.Divide (y2 + 7y + 10) ÷ (y + 5)
7. Factorise: x2 + xy + 8x + 8y
8. Factorise a2 + 8a +16
9. Divide 28x4 ÷ 56x
10. Divide as directed. 5(2x + 1) (3x + 5) ÷ (2x + 1)
11.factorise p
2 – 81
12.Multiply (2x + 5) and (4x – 3)
13. Simplify: a(a2 + a + 1) + 5 and find its value for
(i) a = 0 (ii) a = 1 (iii) a = -1
14. Use the identity (x + a)(x + b) = x2 + (a + b)x + ab to find the following
products.
(x + 3) (x + 7) (2a2 + 9) (2a2 + 5)
15.Simplify:
(i) (x2 – 5) (x + 5) + 25 (ii) (a2 + 5)(b3 + 3) + 5
.
Answer:
i think D one because only magnet move towards the conductor
hope this answer helps you
i am not sure