Question
Find angle PSQ when RT is tangent to the circle at S
In the given diagram, RT is a tangent touching the circle at S. If ∠PST = 30° and ∠SPQ = 60°, then…
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Question
If x minus 2 is a factor of a polynomial find k
If x − 2 is a factor of x3 − kx − 12, then the value of k is: (a) 3 (b)…
Question
If a matrix equation is given find the values of x and y
If , the values of x and y respectively are: (a) 1, −2 (b) −2, 1 (c) 1, 2 (d) −2, −1
Question
Lead aprons and radioactive decay of sodium-24
(a) (i) Which element is used in the lining of the special aprons worn by workers in nuclear power plants? (ii) Why…
Question
A magnet and coil move with equal speeds
When the magnet shown in the diagram is moved towards the coil at a speed of 5 m s−1, the galvanometer shows…
Question
An electric iron rated 1100 W 220 V is operated for 5 hours
An electric iron rated 1100 W, 220 V is operated for 5 hours. Calculate: (a) the minimum rating of the fuse required.…
Question
Calculate resistance across AB when switch S is open and closed
In the combinations of resistors shown below, calculate: (a) the resistance across AB when switch S is open. (b) the resistance across…
Question
Incorrect wiring of a three-pin plug
The reverse side of a three-pin plug with incorrect connection of wires is shown below. (a) Identify the fault in the above…
Question
Bulbs A and B are connected as shown in the diagram
Bulb A rated 160 W, 40 V and Bulb B rated 40 W, 40 V are connected as shown in the diagram.…
Question
Two persons stand 170 m apart in front of a cliff
Two persons A and B are standing in front of a cliff in the same line, 170 m apart, as shown in…